Question

Resolva as equações do 1° grau.
a) 3x +2x = 45

b) 4x -5 = -2x + 55

c) 7x - 5x= 30

d) -4x +6x = -x + 36

e) 3x + 4x -15 = 2x + 85

f) 2x + x + 10= 34


podem ajudar?​

Answer 1

A) 3x +2x = 45

5x = 45

x = 45/5

x = 9

B) 4x -5 = -2x + 55

4x + 2x = 55 + 5

6x = 60

x = 60/6

x = 10

C) 7x - 5x= 30

2x = 30

x = 30/2

x = 15

D) -4x + 6x = -x + 36

3x = 36

x = 12

E) 3x + 4x -15 = 2x + 85

5x = 100

x = 100/5

x= 20

F) 2x + x + 10= 34

3x = 24

x = 24/3

x = 8